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FlinkKafkaConsumer let's you consume data from one or more kafka topics. versions The consumer to use depends on your kafka distribution. FlinkKafkaConsumer08: uses the old SimpleConsumer API of Kafka. Offsets are handled by Flink and committed to zookeeper. FlinkKafkaConsumer09: uses the new ...

As explained in the docs, With Flink’s checkpointing enabled, the Flink Kafka Consumer will consume records from a topic and periodically checkpoint all its Kafka offsets, together with the state of other operations, in a consistent manner. In case of a job failure, Flink will restore the streami...

SimpleStringSchema: SimpleStringSchema deserializes the message as a string. In case your messages have keys, the latter will be ignored. new FlinkKafkaConsumer09<>(kafkaInputTopic, new SimpleStringSchema(), prop); JSONDeserializationSchema JSONDeserializationSchema deserializes json-form...

In kafka, each consumer from the same consumer group gets assigned one or more partitions. Note that it is not possible for two consumers to consume from the same partition. The number of flink consumers depends on the flink parallelism (defaults to 1). There are three possible cases: kafka pa...

To use a custom schema, all you need to do is implement one of the SerializationSchema or DeserializationSchema interface. public class MyMessageSchema implements DeserializationSchema<MyMessage>, SerializationSchema<MyMessage> { @Override public MyMessage deserialize(byte[]...

Three different methods of insertion can used with sets. First, a simple insert of the value. This method returns a pair allowing the caller to check whether the insert really occurred. Second, an insert by giving a hint of where the value will be inserted. The objective is to optimize the inser...

All the insertion methods from sets also apply to multisets. Nevertheless, another possibility exists, which is providing an initializer_list: auto il = { 7, 5, 12 }; std::multiset<int> msut; msut.insert(il);

set and multiset have default compare methods, but in some cases you may need to overload them. Let's imagine we are storing string values in a set, but we know those strings contain only numeric values. By default the sort will be a lexicographical string comparison, so the order won't match the n...

There are several ways to search a given value in std::set or in std::multiset: To get the iterator of the first occurrence of a key, the find() function can be used. It returns end() if the key does not exist. std::set<int> sut; sut.insert(10); sut.insert(15); sut.insert(22); ...

The most obvious method, if you just want to reset your set/multiset to an empty one, is to use clear: std::set<int> sut; sut.insert(10); sut.insert(15); sut.insert(22); sut.insert(3); sut.clear(); //size of sut is 0 Then the erase method can be used.  It offers some poss...

/** * requestdata - the data packet expected to be passed in by external system * JSON - data format exchange * stringify() convert javascript object into a string with JSON.stringify() * nlobjError - add in catch block to log exceptions */ function GetCustomerData(requestdata) { ...

Create an F# console application. Change the Output type of the application to Windows Application. Add the FsXaml NuGet package. Add these four source files, in the order listed here. MainWindow.xaml <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" ...

A DO WHILE loop will continue to loop unless the WHILE-part is met. This makes it easy to run forever and eat up all time from one CPU core. DO WHILE expression: END. expression is any combination of boolean logic, comparisons, variables, fields etc that evaluates to a true value. /* This is...

This iteration changes a value from a starting point to an end, optionally by a specified value for each step. The default change is 1. DEFINE VARIABLE i AS INTEGER NO-UNDO. DO i = 10 TO 15: DISPLAY i WITH FRAME x1 6 DOWN . DOWN WITH FRAME x1. END. Result: ---------------i ...

Imagine you're testing code that makes a call to this interface, and you want to make sure your retry code is working. public interface DataStore { void save(Data data) throws IOException; } You could do something like this: public void saveChanges_Retries_WhenDataStoreCallFails() { ...

import numpy as np import matplotlib.pyplot as plt # create some data x = np.arange(-2, 20, 0.5) # values of x y1 = map(lambda x: -4.0/3.0*x + 16, x) # values of y1(x) y2 = map(lambda x: 0.2*x**2 -5*x + 32, x) # svalues of y2(x) fig = plt.figure() ax1 = fig.add_subplo...

Import ReactiveFormsModule, and then import { Component, OnInit, OnDestroy } from '@angular/core'; import { FormControl } from '@angular/forms'; import { Subscription } from 'rxjs'; @Component({ selector: 'component', template: ` <input [formControl]="control" /> ...

For those of you that are new to programming in Swift and those of you coming from different programming bases, such as Python or Java, this article should be quite helpful. In this post, we will discuss a simple solution for implementing swift algorithms. Fizz Buzz You may have seen Fizz Buzz wri...

REPEAT, will repeat itself forever unless you explicitly exit the loop: //Runs forever REPEAT: // Do stuff END. To exit the loop you can use the LEAVE keyword. With or without a label. Without a label LEAVE will always effect the current loop. With a name you can specify what loop to LEAV...

Let's explore an example Transaction search where we define a filter for a single transaction's internal ID: We've specified a filter to only show us results for the Transaction with the internal ID of 875; here is that Transaction: We can see it is a Sales Order with a single line item. Beca...